svn commit: r363827 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Tue Aug  4 06:38:10 2020
New Revision: 363827
URL: https://svnweb.freebsd.org/changeset/base/363827

Log:
  Added a new syzkaller reproducer.

Added:
  user/pho/stress2/misc/syzkaller19.sh   (contents, props changed)

Added: user/pho/stress2/misc/syzkaller19.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/syzkaller19.sh	Tue Aug  4 06:38:10 2020	(r363827)
@@ -0,0 +1,173 @@
+#!/bin/sh
+
+# panic: sleeping without a lock
+# cpuid = 17
+# time = 1594020733
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe013e99d6d0
+# vpanic() at vpanic+0x182/frame 0xfffffe013e99d720
+# panic() at panic+0x43/frame 0xfffffe013e99d780
+# _sleep() at _sleep+0x466/frame 0xfffffe013e99d820
+# soclose() at soclose+0x12a/frame 0xfffffe013e99d890
+# _fdrop() at _fdrop+0x1a/frame 0xfffffe013e99d8b0
+# closef() at closef+0x1db/frame 0xfffffe013e99d940
+# fdescfree_fds() at fdescfree_fds+0x3c/frame 0xfffffe013e99d990
+# fdescfree() at fdescfree+0x36c/frame 0xfffffe013e99da50
+# exit1() at exit1+0x487/frame 0xfffffe013e99dac0
+# sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe013e99dad0
+# amd64_syscall() at amd64_syscall+0x159/frame 0xfffffe013e99dbf0
+# fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe013e99dbf0
+# --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x8004513da, rsp = 0x7fffffffe548, rbp = 0x7fffffffe560 ---
+# KDB: enter: panic
+# [ thread pid 86998 tid 100362 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x10c3a16(%rip)
+# db> x/s version
+# version:FreeBSD 13.0-CURRENT #2 r362887+d0cb7ae7cb9-c248258(mlnx3): Sat
+# Jul  4 10:28:49 CEST 2020 pho at t2.osted.lan:/var/tmp/deviant2/sys/amd64/compile/PHO
+# db>
+
+# $FreeBSD$
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller19.c <<EOF
+// https://syzkaller.appspot.com/bug?id=2196001e8447f2133532abeabaea2ebc0351f67b
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+e625d92c1dd74e402c81 at syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/endian.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static void kill_and_wait(int pid, int* status)
+{
+  kill(pid, SIGKILL);
+  while (waitpid(-1, status, 0) != pid) {
+  }
+}
+
+static void sleep_ms(uint64_t ms)
+{
+  usleep(ms * 1000);
+}
+
+static uint64_t current_time_ms(void)
+{
+  struct timespec ts;
+  if (clock_gettime(CLOCK_MONOTONIC, &ts))
+    exit(1);
+  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
+}
+
+static void execute_one(void);
+
+#define WAIT_FLAGS 0
+
+static void loop(void)
+{
+  int iter;
+  for (iter = 0;; iter++) {
+    int pid = fork();
+    if (pid < 0)
+      exit(1);
+    if (pid == 0) {
+      execute_one();
+      exit(0);
+    }
+    int status = 0;
+    uint64_t start = current_time_ms();
+    for (;;) {
+      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
+        break;
+      sleep_ms(1);
+      if (current_time_ms() - start < 5 * 1000)
+        continue;
+      kill_and_wait(pid, &status);
+      break;
+    }
+  }
+}
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_one(void)
+{
+  intptr_t res = 0;
+  res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
+  if (res != -1)
+    r[0] = res;
+  *(uint8_t*)0x20000000 = 0x1c;
+  *(uint8_t*)0x20000001 = 0x1c;
+  *(uint16_t*)0x20000002 = htobe16(0x4e22);
+  *(uint32_t*)0x20000004 = 0;
+  *(uint8_t*)0x20000008 = 0;
+  *(uint8_t*)0x20000009 = 0;
+  *(uint8_t*)0x2000000a = 0;
+  *(uint8_t*)0x2000000b = 0;
+  *(uint8_t*)0x2000000c = 0;
+  *(uint8_t*)0x2000000d = 0;
+  *(uint8_t*)0x2000000e = 0;
+  *(uint8_t*)0x2000000f = 0;
+  *(uint8_t*)0x20000010 = 0;
+  *(uint8_t*)0x20000011 = 0;
+  *(uint8_t*)0x20000012 = 0;
+  *(uint8_t*)0x20000013 = 0;
+  *(uint8_t*)0x20000014 = 0;
+  *(uint8_t*)0x20000015 = 0;
+  *(uint8_t*)0x20000016 = 0;
+  *(uint8_t*)0x20000017 = 0;
+  *(uint32_t*)0x20000018 = 0;
+  syscall(SYS_bind, r[0], 0x20000000ul, 0x1cul);
+  *(uint8_t*)0x20000180 = 0x1c;
+  *(uint8_t*)0x20000181 = 0x1c;
+  *(uint16_t*)0x20000182 = htobe16(0x4e22);
+  *(uint32_t*)0x20000184 = 0;
+  *(uint64_t*)0x20000188 = htobe64(0);
+  *(uint64_t*)0x20000190 = htobe64(1);
+  *(uint32_t*)0x20000198 = 0;
+  syscall(SYS_connect, r[0], 0x20000180ul, 0x1cul);
+  *(uint64_t*)0x20000080 = 0;
+  *(uint32_t*)0x20000088 = 0;
+  *(uint64_t*)0x20000090 = 0;
+  *(uint64_t*)0x20000098 = 0;
+  *(uint64_t*)0x200000a0 = 0;
+  *(uint64_t*)0x200000a8 = 0x60;
+  *(uint32_t*)0x200000b0 = 0;
+  syscall(SYS_sendmsg, r[0], 0x20000080ul, 0x10cul);
+  *(uint32_t*)0x200000c0 = 0xbd;
+  *(uint32_t*)0x200000c4 = 0;
+  syscall(SYS_setsockopt, r[0], 0xffff, 0x80, 0x200000c0ul, 8ul);
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  loop();
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller19 -Wall -Wextra -O2 /tmp/syzkaller19.c -lpthread ||
+    exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+(cd /tmp; ./syzkaller19) &
+sleep 60
+pkill -9 syzkaller19 swap
+wait
+
+rm -f /tmp/syzkaller19 /tmp/syzkaller19.c /tmp/syzkaller19.core
+exit 0